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materialsystem/stdshaders/emissive_scroll_blended_pass_dx8_helper.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+
+/* Example how to plug this into an existing shader:
+
+		In the VMT:
+			// Emissive Scroll Pass
+			"$emissiveBlendEnabled"      "1" // Enables effect
+			"$emissiveBlendTexture"      "models/vortigaunt/vortigaunt_illum"
+			"$emissiveBlendBaseTexture"  "Models/Vortigaunt/vortigaunt_blue"
+			"$emissiveBlendFlowTexture"  "models/vortigaunt/vortigaunt_flow"
+			"$emissiveBlendTint"         "[10 10 10]"
+			"$emissiveBlendStrength"     "1.0" // Set by game code
+			"$emissiveBlendScrollVector" "[0.11 0.124]"
+			"Proxies"
+			{
+				"VortEmissive" // For setting $selfillumstrength
+				{
+				}
+			}
+
+		#include "emissive_scroll_blended_pass_helper.h"
+
+		In BEGIN_SHADER_PARAMS:
+			// Emissive Scroll Pass
+			SHADER_PARAM( EMISSIVEBLENDENABLED, SHADER_PARAM_TYPE_BOOL, "0", "Enable emissive blend pass" )
+			SHADER_PARAM( EMISSIVEBLENDBASETEXTURE, SHADER_PARAM_TYPE_TEXTURE, "", "self-illumination map" )
+			SHADER_PARAM( EMISSIVEBLENDSCROLLVECTOR, SHADER_PARAM_TYPE_VEC2, "[0.11 0.124]", "Emissive scroll vec" )
+			SHADER_PARAM( EMISSIVEBLENDSTRENGTH, SHADER_PARAM_TYPE_FLOAT, "1.0", "Emissive blend strength" )
+			SHADER_PARAM( EMISSIVEBLENDTEXTURE, SHADER_PARAM_TYPE_TEXTURE, "", "self-illumination map" )
+			SHADER_PARAM( EMISSIVEBLENDTINT, SHADER_PARAM_TYPE_COLOR, "[1 1 1]", "Self-illumination tint" )
+
+		Add this above SHADER_INIT_PARAMS()
+			// Emissive Scroll Pass
+			void SetupVarsEmissiveScrollBlendedPass( EmissiveScrollBlendedPassVars_t &info )
+			{
+				info.m_nBlendStrength = EMISSIVEBLENDSTRENGTH;
+				info.m_nBaseTexture = EMISSIVEBLENDBASETEXTURE;
+				info.m_nFlowTexture = -1; // Not used in DX8
+				info.m_nEmissiveTexture = EMISSIVEBLENDTEXTURE;
+				info.m_nEmissiveTint = EMISSIVEBLENDTINT;
+				info.m_nEmissiveScrollVector = EMISSIVEBLENDSCROLLVECTOR;
+			}
+
+		In SHADER_INIT_PARAMS()
+			// Emissive Scroll Pass
+			if ( !params[EMISSIVEBLENDENABLED]->IsDefined() )
+			{
+				params[EMISSIVEBLENDENABLED]->SetIntValue( 0 );
+			}
+			else if ( params[EMISSIVEBLENDENABLED]->GetIntValue() )
+			{
+				EmissiveScrollBlendedPassVars_t info;
+				SetupVarsEmissiveScrollBlendedPass( info );
+				InitParamsEmissiveScrollBlendedPass( this, params, pMaterialName, info );
+			}
+
+		In SHADER_INIT
+			// Emissive Scroll Pass
+			if ( params[EMISSIVEBLENDENABLED]->GetIntValue() )
+			{
+				EmissiveScrollBlendedPassVars_t info;
+				SetupVarsEmissiveScrollBlendedPass( info );
+				InitEmissiveScrollBlendedPass( this, params, info );
+			}
+
+		At the very end of SHADER_DRAW
+			// Emissive Scroll Pass
+			if ( params[EMISSIVEBLENDENABLED]->GetIntValue() )
+			{
+				// If ( snapshotting ) or ( we need to draw this frame )
+				if ( ( pShaderShadow != NULL ) || ( params[EMISSIVEBLENDSTRENGTH]->GetFloatValue() > 0.0f ) )
+				{
+					EmissiveScrollBlendedPassVars_t info;
+					SetupVarsEmissiveScrollBlendedPass( info );
+					DrawEmissiveScrollBlendedPass( this, params, pShaderAPI, pShaderShadow, info );
+				}
+				else // We're not snapshotting and we don't need to draw this frame
+				{
+					// Skip this pass!
+					Draw( false );
+				}
+			}
+
+==================================================================================================== */
+
+#include "BaseVSShader.h"
+#include "mathlib/vmatrix.h"
+#include "emissive_scroll_blended_pass_helper.h"
+#include "convar.h"
+
+// Auto generated inc files
+#include "emissive_scroll_blended_pass_dx8_vs11.inc"
+
+void InitParamsEmissiveScrollBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, const char *pMaterialName, EmissiveScrollBlendedPassVars_t &info )
+{
+	SET_FLAGS2( MATERIAL_VAR2_SUPPORTS_HW_SKINNING );
+
+	if ( ( info.m_nEmissiveScrollVector >= 0 ) && ( !params[info.m_nEmissiveScrollVector]->IsDefined() ) )
+	{
+		params[info.m_nEmissiveScrollVector]->SetVecValue( kDefaultEmissiveScrollVector, 4 );
+	}
+
+	if ( ( info.m_nBlendStrength >= 0 ) && ( !params[info.m_nBlendStrength]->IsDefined() ) )
+	{
+		params[info.m_nBlendStrength]->SetFloatValue( kDefaultEmissiveBlendStrength );
+	}
+
+	if ( ( info.m_nEmissiveTint >= 0 ) && ( !params[info.m_nEmissiveTint]->IsDefined() ) )
+	{
+		params[info.m_nEmissiveTint]->SetVecValue( kDefaultEmissiveTint, 4 );
+	}
+
+	SET_PARAM_FLOAT_IF_NOT_DEFINED( info.m_nTime, 0.0f );
+}
+
+void InitEmissiveScrollBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, EmissiveScrollBlendedPassVars_t &info )
+{
+	// Load textures
+	pShader->LoadTexture( info.m_nBaseTexture );
+	pShader->LoadTexture( info.m_nEmissiveTexture );
+}
+
+void DrawEmissiveScrollBlendedPass( CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI,
+								   IShaderShadow* pShaderShadow, EmissiveScrollBlendedPassVars_t &info, VertexCompressionType_t vertexCompression )
+{
+	SHADOW_STATE
+	{
+		// Reset shadow state manually since we're drawing from two materials
+		pShader->SetInitialShadowState();
+
+		// Set stream format
+		pShaderShadow->VertexShaderVertexFormat( VERTEX_POSITION | VERTEX_NORMAL, 1, 0, 0 );
+
+		// Vertex Shader
+		emissive_scroll_blended_pass_dx8_vs11_Static_Index vshIndex;
+		pShaderShadow->SetVertexShader( "emissive_scroll_blended_pass_dx8_vs11", vshIndex.GetIndex() );
+
+		// Pixel Shader
+		pShaderShadow->SetPixelShader( "emissive_scroll_blended_pass_dx8_ps11", 0 );
+
+		// Textures
+		pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+		pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+		pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );
+
+		// Blending
+		pShader->EnableAlphaBlending( SHADER_BLEND_ONE, SHADER_BLEND_ONE );
+		pShaderShadow->EnableAlphaWrites( false );
+	}
+	DYNAMIC_STATE
+	{
+		// Reset render state manually since we're drawing from two materials
+		pShaderAPI->SetDefaultState();
+
+		// Set Vertex Shader Combos
+		emissive_scroll_blended_pass_dx8_vs11_Dynamic_Index vshIndex;
+		vshIndex.SetSKINNING( pShaderAPI->GetCurrentNumBones() > 0 );
+		pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
+
+		// Set Vertex Shader Constants 
+		pShader->SetVertexShaderTextureTransform( VERTEX_SHADER_SHADER_SPECIFIC_CONST_0, BASETEXTURETRANSFORM );
+
+		float vEmissiveScrollVector[4] = { kDefaultEmissiveScrollVector[0], kDefaultEmissiveScrollVector[1], 0.0f, 0.0f };
+		if ( IS_PARAM_DEFINED( info.m_nEmissiveScrollVector ) )
+		{
+			const float *flPtr = params[info.m_nEmissiveScrollVector]->GetVecValue();
+			if ( flPtr != NULL )
+			{
+				vEmissiveScrollVector[0] = flPtr[0];
+				vEmissiveScrollVector[1] = flPtr[1];
+			}
+		}
+
+		float curTime = IS_PARAM_DEFINED( info.m_nTime ) && params[info.m_nTime]->GetFloatValue() > 0.0f ? params[info.m_nTime]->GetFloatValue() : pShaderAPI->CurrentTime();
+		float selfIllumScroll[4] = { vEmissiveScrollVector[0] * curTime, vEmissiveScrollVector[1] * curTime, 0.0f, 0.0f };
+		pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_4, selfIllumScroll, 1 );
+
+		// Set Pixel Shader Combos
+		/* None */
+
+		// Bind textures
+		pShader->BindTexture( SHADER_SAMPLER0, info.m_nBaseTexture );
+		pShader->BindTexture( SHADER_SAMPLER1, info.m_nEmissiveTexture );
+
+		// Set Pixel Shader Constants (Copied from vortwarp code)
+		pShader->SetModulationPixelShaderDynamicState( 3 );
+		pShader->EnablePixelShaderOverbright( 0, true, true );
+
+		pShaderAPI->SetPixelShaderConstant( 1, IS_PARAM_DEFINED( info.m_nEmissiveTint ) ? params[info.m_nEmissiveTint]->GetVecValue() : kDefaultEmissiveTint, 1 );
+
+		float c4[4] = { 0.0f, 0.0f, 0.0f, 0.0f }; // NOTE: w is written to dest alpha
+		c4[0] = IS_PARAM_DEFINED( info.m_nBlendStrength ) ? params[info.m_nBlendStrength]->GetFloatValue() : kDefaultEmissiveBlendStrength;
+		c4[1] = c4[0];
+		c4[2] = c4[0];
+		pShaderAPI->SetPixelShaderConstant( 4, c4, 1 );
+
+		float c5[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
+		pShaderAPI->SetPixelShaderConstant( 5, c5, 1 );
+	}
+	pShader->Draw();
+}